MLA Posted January 20, 2017 Report Posted January 20, 2017 Am looking at it but I don't see the input resistors (file diffinput3 right?). Quote
kevin gilmore Posted January 20, 2017 Report Posted January 20, 2017 (edited) it had better look like this the output impedance is about 1k, working on the diamond buffer output now Edited January 20, 2017 by kevin gilmore 3 Quote
MLA Posted January 20, 2017 Report Posted January 20, 2017 Now it does. Thanks! Must have been the cache of my browser acting up. Quote
mtoc Posted January 22, 2017 Report Posted January 22, 2017 Pardon me, how to wire the boards? why O+ one one side, i+ on the other? GND GND -i O- Quote
kevin gilmore Posted January 22, 2017 Report Posted January 22, 2017 (edited) start laying out your own boards and you will know why. there will be a all smd version at some point with these as output buffers .8 x 1.5 inch Edited January 22, 2017 by kevin gilmore 5 Quote
kevin gilmore Posted January 22, 2017 Report Posted January 22, 2017 for soren, thru hole version with servo Quote
Pars Posted January 23, 2017 Report Posted January 23, 2017 start laying out your own boards and you will know why.+1Sent from my iPhone using Tapatalk Quote
sbelyo Posted January 23, 2017 Author Report Posted January 23, 2017 Now we're talking... So if I understand that would go after the output from the unbalanced\balanced to balanced board. Is that correct? Quote
kevin gilmore Posted January 23, 2017 Report Posted January 23, 2017 yep, gets the output impedance down to say 5 ohms. then you can add some resistance to match the cables you intend on using, +45 or +70 ohms Quote
cspirou Posted January 23, 2017 Report Posted January 23, 2017 It looks like the buffer is single ended. So would you need 4 diamond buffers for 2 balanced channels? Quote
MLA Posted January 23, 2017 Report Posted January 23, 2017 (edited) On 2017-01-22 at 1:38 PM, kevin gilmore said: there will be a all smd version at some point with these as output buffers .8 x 1.5 inch Really looking forward to that! Edited January 23, 2017 by MLA Quote
kevin gilmore Posted January 23, 2017 Report Posted January 23, 2017 (edited) some people are going to have trouble assembling this, same size for comparison see updated picture below Edited January 23, 2017 by kevin gilmore 1 Quote
MLA Posted January 24, 2017 Report Posted January 24, 2017 (edited) 6 hours ago, kevin gilmore said: some people are going to have trouble assembling this Possibly, but it's still fantastic!!! Edited January 24, 2017 by MLA Quote
kevin gilmore Posted January 24, 2017 Report Posted January 24, 2017 (edited) moar better 2.65 x 2.27 inch Edited January 24, 2017 by kevin gilmore 3 Quote
luvdunhill Posted January 24, 2017 Report Posted January 24, 2017 Now you just need a second on the other side of the board Quote
MLA Posted January 24, 2017 Report Posted January 24, 2017 (edited) 24 minutes ago, luvdunhill said: Now you just need a second on the other side of the board Or a diamond buffer or two ... (or are they better off separated?) Edited January 24, 2017 by MLA Quote
Pars Posted January 24, 2017 Report Posted January 24, 2017 I would think that incorporating the diamond buffers for balanced would be the way to go. Do you have a schematic for this board as well?Broken record time... Any chance of including footprints for 0.1" Molex KK connectors as well?Good time to duck now Sent from my iPhone using Tapatalk Quote
sbelyo Posted January 24, 2017 Author Report Posted January 24, 2017 (edited) Am I going to need an oven for my birthday? Or, will there be a through hole version with the diamond buffer included? Ducking as well If not I'll be fine with four or the through hole buffer boards and the unbal board Edited January 24, 2017 by sbelyo Quote
kevin gilmore Posted January 24, 2017 Report Posted January 24, 2017 diamond buffers will stand vertical on that board. there are thru hole versions of both pieces already 2 Quote
mtoc Posted January 24, 2017 Report Posted January 24, 2017 any possibility to make these two new input output boards smaller than ever before while making them still be better than all the versions which released last year? (small size saves money) Quote
MLA Posted January 24, 2017 Report Posted January 24, 2017 For all intents and purposes, that's exactly what just happened. 2 Quote
sorenb Posted January 24, 2017 Report Posted January 24, 2017 how does this compare to the 49830? (I know it's obsolete, but still) Quote
kevin gilmore Posted January 25, 2017 Report Posted January 25, 2017 lm49830 is a chip amp do you mean opa1632 and its clones, all of which require huge amounts of feedback and have all sorts of common mode dc issues 1 Quote
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